Internal-combustion engine



Dec. 30, 1924. 7 1,520,875

A. J. LAVOIE INTERNAL COMBUSTTON ENGINE Original Filed Dec. 9, 1920 E 6 u 9 10 m 8 $29? g x Q l I F I f 1 INVEN OR 0. Zw iy Br -%f/MW ATTORNEY Patented Dec. 30, 1924. A i 1,520,875

UNITED STATES PATENT OFFICE.

ALPI-IONSE JOSEPH LAVOIE, '1? MONTREAL, QUEBEC, CANADA.

INTERNAL-COMBUSTION ENGINE.

Application filed December 9, 1920, Serial No. 429,483. Renewed September 29, 1924.

To all whom it may concern: inder 6 at the drain opening 7 into which Be it known that I, ALPHoNsE JOSEPH the pet cock 8 is screw-threaded, the wall LAVOLE, and residing at 294 Wilson Avenue, of said opening from the upper side conin the city and District of Montreal, in the verging at 9 to accommodate the spark plug Province of Quebec, in the Dominion of 10 in the opening 11. Canada, have invented new and useful The drain opening 7 is slightly below the Internal-Combustion Engines, of which the face of the piston head 4 at the extremity following is the specification. of the upstroke of thepiston 1 and rod 12, The invention relates to internal comand has the same slope, consequently all 10 bustion engines as described in the present accumulations of oil, whether lubricant or specification and illustrated in the accomgasoline must flow to said opening 7 where panying drawings that form part of the it collects as far as the valve of the pet cook,

same. which is opened occasionally to draw away The invention consists essentlally of the the collection. 15 novel means employed whereby the explo- In this way the explosion chamber is sion chamber is relieved of the accumulamaintained in a clean condition, so that tion of refuse oils, thereby avoiding the dethere is a minimum quantity of lubricant posit of carbon and its ultimate deleterious oil to carbonize and no surplus liquid gasoeffects. line to reduce the efliciency of the engine.

20 The objects of the invention are to main It may also be mentioned that where the tain the efficiency of the engine throughout cylinders of an engine are themselves invarying conditions of feed and service; to clined there will be less occasion to form economize in the consumption of fuel and the piston head faces with a considerable lubricant; to reduce the cost of maintenance slope, in fact in some cases the incline will 25 in gasoline motors; to facilitate the ignition in itself be suificient to run off the oil into 5 of the charge; and generally to provide a the drain opening. reliable durable and efficient engine. hat I claim is In the drawings, Figure 1 is a sectional In an internal combustion engine, a cylperspective view, showing portions of the inder having a sloping drain opening from 30 cylinder and piston and the explosion charm the explosion chamber having its upper ber. side converging to accommodate an open- Figure 2 is a vertical View showing the ing for the spark plug, a spark plug screwengine cylinder partially in section. threaded into the latter opening, a pet cool; Like numerals of reference indicate corscrew-threaded into the drain opening and 35 responding parts in each figure. a piston having an inclined head forming Referring to the drawings, the piston 1 a face flush with said drain opening in the is formed with the customary cylindrical uppermost position of the piston. shaped wall 2, having the wrist pin 3 there- Signed at Montreal, Quebec, Canada, this across and the inclined head 4 forming the second day of December, 1920.

face 5 sloping to the inner wall of the cyl- ALPI-IONSE JOSEPH LAVOIE. 

